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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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101 lines
3.7 KiB
Python
101 lines
3.7 KiB
Python
import gobject
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gobject.threads_init()
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import gtk
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gtk.gdk.threads_init()
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import hildon
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import gst
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import sys
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# VideoWidget taken from play.py in gst-python examples
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class VideoWidget(gtk.DrawingArea):
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def __init__(self):
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gtk.DrawingArea.__init__(self)
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self.imagesink = None
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self.unset_flags(gtk.DOUBLE_BUFFERED)
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def do_expose_event(self, event):
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if self.imagesink:
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self.imagesink.expose()
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return False
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else:
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return True
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def set_sink(self, sink):
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assert self.window.xid
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self.imagesink = sink
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self.imagesink.set_xwindow_id(self.window.xid)
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class MaemoGstView:
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def __init__(self):
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# hildon has one program instance per app, so get instance
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self.p = hildon.Program.get_instance()
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# set name of application: this shows in titlebar
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gtk.set_application_name("Maemo GStreamer VideoTest")
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# stackable window in case we want more windows in future in app
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self.w = hildon.StackableWindow()
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box = gtk.VBox()
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self.video_widget = VideoWidget()
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# video widget we want to expand to size
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box.pack_start(self.video_widget, True, True, 0)
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# a button finger height to play/pause
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self.button = hildon.Button(gtk.HILDON_SIZE_FINGER_HEIGHT,
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hildon.BUTTON_ARRANGEMENT_VERTICAL, title="Pause")
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self.button.connect_after("clicked", self.on_button_clicked)
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# don't want button to expand or fill, just stay finger height
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box.pack_start(self.button, False, False, 0)
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self.w.add(box)
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self.w.connect("delete-event", gtk.main_quit)
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self.p.add_window(self.w)
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self.w.show_all()
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self.start_streaming()
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def start_streaming(self):
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# we use ximagesink solely for screenshotting ability
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# less cpu usage would happen with videotestsrc ! xvimagesink
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self.pipeline = \
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gst.parse_launch("videotestsrc ! videoscale ! ximagesink")
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bus = self.pipeline.get_bus()
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# need to connect to sync message handler so we get the sink to be
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# embedded at the right time and not have a temporary new window
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bus.enable_sync_message_emission()
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bus.add_signal_watch()
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bus.connect("sync-message::element", self.on_sync_message)
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bus.connect("message", self.on_message)
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self.pipeline.set_state(gst.STATE_PLAYING)
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def on_sync_message(self, bus, message):
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if message.structure is None:
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return
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if message.structure.get_name() == 'prepare-xwindow-id':
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# all this is needed to sync with the X server before giving the
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# x id to the sink
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gtk.gdk.threads_enter()
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gtk.gdk.display_get_default().sync()
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self.video_widget.set_sink(message.src)
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message.src.set_property("force-aspect-ratio", True)
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gtk.gdk.threads_leave()
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def on_message(self, bus, message):
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if message.type == gst.MESSAGE_ERROR:
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err, debug = message.parse_error()
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hildon.hildon_banner_show_information(self.w, '',
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"Error: %s" % err)
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def on_button_clicked(self, widget):
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success, state, pending = self.pipeline.get_state(1)
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# do not listen if in middle of state change
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if not pending:
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if state == gst.STATE_PLAYING:
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self.pipeline.set_state(gst.STATE_PAUSED)
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self.button.set_label("Play")
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else:
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self.pipeline.set_state(gst.STATE_PLAYING)
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self.button.set_label("Pause")
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def main():
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view = MaemoGstView()
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gtk.main()
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if __name__ == '__main__':
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sys.exit(main())
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